Typewriting machien



Nov. 24, 1936. H. scHULER -TYPEWRITING MACHINE 2 sheets-sheet, 1

Filed Jan. 2. 1935 [iwf Nav. 24,- 1936 ...L SCHUL'R 2,062,236

\ TYPEWRITING MACHINE Filed Jam 2, 1935 2 sheets-sheet 2v Fig. 3

Patented Nov.Y 24,v A1936 PATENT oF'ElCE Hugo Schler, Chemnitz, Germany;assigner to Wanderer-Werke vorm. Winklhofer & Jaenicke Akt-Ges.,Schonau, near Chemnitz, German?T Application January 2, 1935, Serial No.141

In Germanyv December 28, 1933 1c Claims. (ol. 19u-149)' This inventionrelates toa typewriter, particularly of the type bar class, providedwith means for adjusting the platen forward o-r backward in the strikingdirection of the type.

5 In the known typewriters of this class the platen adjusting devicesinterfere with sure and accurate guiding and moving of the platen inlongitudinal direction. To adjust the platen its carriage, with thecomplete guiding mechanism, is

l0 disposed in known machines on a displaceable slide held in anarrowgroovelike guide in the center of the machine and guided so as to bedisplaceable forward orbackward in the striking di'- rection of the typefaces. This construction is,

however, open .to the objection that the `platen carriage cannot besafely held against torsional stress and tiltingrin horizontalandvertical -directions. In case of long and heavy carriages these troubleswill naturally be considerably in- "m creased.

The invention purports to eliminate ,these` troubles and to provide atypewriter, in which the carriage can be easily andaccurately adjustedforward or backward and yet be simply and safely supported and guidedwith respect to all stresses.- According to the invention, this `objectis attained by rendering one of a plurality-of railsY guiding'thecarriage adjustable to and fro and thereby permitting the adjustment ofthe platen ,l in the striking direction of the type faces.

. By way of example, one form of the invention is illustrated in theaccompanying drawings, in lwhich Figure lfis a section of the typewriterwith all the parts omitted which are notlrequired for understanding theinvention; Fig. 2, a partial'top l and 5. The carriage I is alsoprovided with the y rollers 6 and 1 b means of which it is guided on ythe front rail 9by a slide guide 3I which passes 45 'under the rail 9,the face of the guide 3I exthe rear rail 8 and the front rail 9 so as tobe movable in, its longitudinal direction, guiding beingpreferablyeiected -on the rear rail 8 by two equal rollers 6 and on thefront rail 9 bythe roller'1 arranged in the center-of the carriage,

5o as shownin Fig. 4. y

' The rear rail 8 is carried 'by' two arms I2, I3 cswingingly arrangedon the machine frame I0 by means of the pivot II. Atv the free lever`armI3 of each carrying arm I2, I3 a slot-like opening I4 sg is providedwith two oppositely disposed parallel machine. by graduation marks onthe handle 26 and pref- 4 erably correspond to the positions of theplaten 25V guide faces I5 between which an eccentric I 6 is guided, botheccentrics I6. being rmly connected' with a' shaft I1. The. shaft I1carries further a rmlyy attached lever arm I8 which is engaged by thetransmission rod I9. 1

'I'he other end ofthe transmission rod I9 is connected with an adjustingmember 2| which can be moved to andv fro in longitudinal direction by a-handle 26 inthe front wall I'IJ'a of the machine for protecting themember 2| against rotation. l5.

The shaft 24 is rotatably disposed in the bracket 25 and the front' wallIIIa of the machine, but protected against longitudinal displacement. Inthe variouspositions the handle 26 and thus the adjusting member 2l aresecured by a spring 20 member 21 which engages corresponding recesses ofa disc 28 attached to the'front wall Ina of the The dlierent positionsare indicated 3 according to the number of copies wanted. y

On the rear rail 8 the carriage I is guided by means o-f the rollers 6and special slide members 30 so that it can move in longitudinaldirection and also cooperate in the motions of the rail 8. To secure thecarriage I against displacement on the rail 8 transversely to thelongitudinal direction thereof the two rear rollers. 6 are provided withtracks having preferably a trape'ziform cross section, so that doubleconical running faces are- 35 I provided for the rollers 6 andtransverse displacements of the carriage Ivrelative to the rail 8 areprevented, which insures -safe transmission of the motions of the railIIv to the carriage I.

The front roller 1 has a cylindrical running 40.

face and can thus slide on the front rail 3 for- Ward and backward instriking direction of the type faces during adjustment of the carriageI. The carriagel is secured against being lifted from tending parallelthe surface line of the cylindrical roller 1.

The member 2 and thus. the platen 3 lare' shifted from lower to upperWriting position by 5o means of an actuating-rail`36- which during thedepressingof the usual shift key, .nt shown, is moved about the shaft 31by meansof the shaft 31 and two'arms 38. The operating rail 36 acts atany position of the carriage I upon a roller.r

by a slide member 3l. The roller 35 and the lface of the slide guide 34are also constructed so that during adjustment of the carriage I theycan be displaced-on the operating'rail 36 in the striklng direction ofthe type faces and transversely to the longitudinal direction of therail.

In the central position of the carriage Ishown in Fig. s1 the middleaxis of the movable rail 8 is located vertically-above the central axiso f thepivots II of the carrying arms I2, I3, so that a plane passingthrough the middle axis of the rail 8 and the pivots II will extendparallel to a plane passing through the writing line 39,

'-i. e., through the point where the type faces 42 strike the platen 3.

In this manner, uniform adjustment of the platen 3 from centralposition, according to Fig. 1, to extreme left or righthand positions isattained.

The transmission rod I9 is engaged by a tension spring 20 whose otherend. is secured to the machine frame III. The spring 20 constantly tendsto draw the rod I8 tothe right, as indicated in Fig. l, to movetheeccentrics I6 anticlockwise and the arms I2, I3 clockwise and thus tokeep the rail 8 always in rearmost position. In doing the type guide-43,the member M indicating the height of the line and the ribbon or ribboncarrier I5 from the front side of the machine;- These parts I3, 44,15,of which the line indicator I4 and the ribbon carrier 45 Dparticipate inthe shift movement of the platen 3, are so arranged on the machineframethat theyare not -aiected by the adjusting motion of the carriage Iin the striking direction of the type faces. This affords the specialadvantage that the carriage I and thus the platen 3 can be accuratelyand'bly adjusted in the striking direction of the faces according to thenumber and thickness` of the sheets. The top sheet, independently of thenumber of copies, can therefore always be adjusted to approximately thesame position relative. to the type guide I3 and the type faces 42 aswell as to the ribbon and the member M' indicating the height of theline, so that the free;

motion 'of these parts will not be impeded, even in case of a largenumber-of copies.

'I'he arrangement of the movably disposed rail l 8 and stationary rail 9permits the supporting iml of the carriage I at least at three, widelyseparated points to secure it,notwithstanding its adjustability,stresses in all directions. Furthermore, owing to the peculiararrangement of the two'rails 8 and 9 and that of the actuating rail 36,-the smallA space available for thecarriage 'guide in machines of thisclass on account of their extensive type driving mechanism is mostfavorably utilized for sure and broad guiding of the carriage I., whichis unusual in suchtypewriters.

I claimz- 1. -In a typewriting machine.' particularly of the class usingtype bars, the combination withV a machine. frame and a carriagecarrying a platen, of a plurality of parallel rails for guiding Y thecarriage, arms constructed as double levers connected at one, end withone of the rails and against tilting and torsionalslotted at the otherend, pivots mounted in the machine frame for movably holding said armsintermediate theirends, said arms being distributed over the length ofthe rail and positioned parallel to one another, slidemembers andgrooved rollers for guiding the carriageon the adjustable railand'preventing its displacement transversely tothe longitudinaldirection of the rail, and means engaging the slotted ends of said arm'sto impart a. rocking movement thereto to and fro in striking directionof the type faces. v

2. A typewriting machine according to claim 1 in which the means forrocking the arms includes a rotatable shaft and eccentrics firmlysecured to said shaft and guided in the slotted ends of the arms toswing them about their pivots.

3. In a typewriting machine, particularly of the class using type' bars,the combination with a machine frame' and a carriage carrying a platen,of a'plurality of parallel rails for guiding the carriage, armsconstructed as double levers connected at one end with one of the railsand slotted at the other end, pivots mounted in theallel toone another,slide members and rollers formed with tracks for guiding the carriage onthe adjustable rail and preventing its displacement transversely to thelongitudinal direction of the rail, a rotatable j'shaft, eccentricsfirmly secured'to said shaftand guided in the slotted ends of the armsfor swinging them about their pivots, a lever arm firmly attached tosaid shaft, a transmission rod engaging said lever arm with one end, anadjusting member connecting with the other end of said rod and directlyactuating it, a graduated handle for said adjusting member in themachine wall for moving said membei` into adjusting positions, means forsecuringV the adjusting' member against'rotation, avgrooved 'shaftrotatably `arranged in said securing meanswith a machine frame and acarriage carrying a u platen, of a plurality of parallel rails forguiding the carriage, arms constructed as double levers connected `atone end with one of the rails and slotted at the other end, pivotsmounted in the 'machine frame for movably holding said arms, said armsbeing distributed over the length of the rail rendered adjustable andpositioned parallel to one another, slide members androllers formed withtracks for guiding the carriage on the adjustable rail and preventingits displacement transversely to the longitudinal direction of the rail,a rotatable shaft, eccentfics firmly secured to said shaft and guided inthe slotted'ends of the arms for them about' their pivots, a lever armfirmly attached to said draft, av transmission ro'd engaging said leverarm with one end, an adjusting member connecting with the other end ofsaidV rodandj dithe machine frame with the other end, said springtending constantly to move the adjustable rail rearwards in the strikingdirection of the .type faces.

5. In a typewriting machine according to claim 1, means for guiding theplaten and shifting .it

5 from lower to upper writing position, said means comprising a, movableactuating rail disposed parallel to the longitudinal axis of theplatenand at least one 'cylindrical roller running on' said actuatingrail in all positions of adjustment -l of the carriage relatively to thetype faces.

6. In a typewriting machine according to claim 1, at least onecylindrical roller running on another of said rails for guiding. thepaper carriage in all positions of the carriage relatively l'to the typefaces, said other rail beingstationary and said cylindrical roller beingso arranged relatively to the grooved rollers as to form therewith athree point support for the carriage.

'7. In a typewriting machine according to claim 2D 1, means for guidingthe-platen andshifting itv from lower to upper writing position saidmeans comprising a movable actuating rail disposed parallel vto thelongitudinal axis of the platen and at least onecylindrical rollerrunning on said actuating rail in any position of adjustment of thecarriage relatively to the type faces, a guide member embracing theactuating rail'to retain the carriage thereon, means for indicating theheight 'of the line/and ribbon carrying means, said twolast-mentionedmeans being independent of any of the mechanism foradjusting the carriage in the striking direction of the type faces.

8. A typewriter comprising a frame, a platen carriage, a plurality ofrailsparallel to the platen axis for supporting and guiding saidcarriage in said frame, a plurality of levers pivotally mount-- ed onco-axial pivots intermediate their ends, -said levers being connectedeach at one end to one of said rails near opposite ends thereof, guidemeans on the carriage engaging the last-mentioned rail in a mannerpreventing movement of thecarriage transversely to said last-mentionedrail, and means engaging the other ends of'both said levers for turningthem about said pivots to move said last-mentioned rail and carriageltransversely to the printing plane.

9. A typewriter comprising a frame, a platen carriage, a plurality ofrails parallel to the platen axis l for supporting and .guiding saidcarriage in said frame, a plurality of levers pivotally vmounted onco-axial pivots intermediate their ends, said levers being connectedeach at one end to one of said rails near opposite ends thereof, guidemeans onthe carriage engaging the lastmentioned rail in a mannerpreventing movement of the carriage transversely to said lastmentionedrail, a pair of eccentrics mounted on a common shaft and respectivelyengaging slots inthe other ends of both said levers, and means includingan operating member mounted at the i -frontof the machine `for turningsaid eccentrics. 10. A typewriter' comprising a frame', a platencarriage, a plurality of rails parallel to the platen axis forsupporting and guiding said carriage in said frame, a plurality ofleverspivotally mounted on co-axial pivots intermediate their ends 4saidlevers being connected each at one end t one of said rails near oppositeends thereof, '70 guide means on the carriage engaging the lastmentionedrail in a manner preventing movement of the carriage transversely tosaid lastv'mentioned rail, a pair of eccentrics mounted on acommon shaftand respectively engaging open fronted slots in the other ends of bothsaid levers, and means including an operating member mounted at thefront of the machine for turning' said eccentrics. I

11. A typewriter comprising a frame, a platen carriage,- a plurality ofrails parallel to the platen 5 axis for supporting and guiding saidcarriage in said frame, a plurality of levers pivotally mountedl onco-axial pivots intermediate their ends, said levers being-connectedeach at one end tol one of said rails near opposite ends thereof, 10 andhaving at their other ends an open fronted slot enlarged at its innerend, guide vmeans on the carriage engaging the last-mentioned rail in amanner preventing movement of the carriage transversely to saidlast-mentioned rail, a 15 pair of eccentrics mounted on a common shaftand respectively engaging slots in the. other ends of both said levers,and meansincluding an operating member-mounted at the front of themachine forl turning said eccentrics.- 20

12. A typewriter comprising a frame, a platen carriage, a plurality ofrails parallel to the platen axis for supporting and guiding saidcarriage in said frame, a plurality of levers pivotally mounted onco-axial pivots intermediate their ends 25 said levers being connectedeach at one end to one of said rails lnear opposite ends thereof,

guide means on the carriage engaging the lastmentioned rail in a mannerpreventing movement of the carriage transversely -to said last-men- 30-tioned rail, a pair of eccentrics mounted on`a common shaft andrespectively engaging Aslots in the other ends of both said levers, andmeans for turning said eccentrics including a knob' rotatably mounted inthe front of the machine, 35 link mechanism between said knob and theeccentric shaft,wand a device between the knob andthe link of saidmechanism for converting rotation of the knob into longitudinal movementof the link. 40 13. A typewriter comprising a frame, a platen carriage,a plurality of rails parallel to the platen axis for supporting andguiding said carriage in said frame, a yplurality of levers pivotally'mounted on co-axial pivotsl intermediate 45 their ends said leversbeing connected each at one end to one of said rails'near opposite endsthereof, guide means on the carriage engaging K the last-mentioned railin a manner preventing movement of the carriage transversely to said 50last-mentioned rail, a pair of eccentrics mounted on a common shaft andrespectively engaging slots in the other ends of both said-levers, andmeans for'turning said eccentrics including a knob rotatably mounted inthe front of 55l the machine, link mechanism between said knob, andtheeccentric shaft, a de'vice between the knob and the'link of saidmechanism for converting rotation of the lmob into longitudinal move. -Y

`carriage, aplurality of rails parallel to the platen t35 axis forsupportingv and guiding said carriage on said frame, one of said railsbeing of substantially round cross-section, a plurality of leverspivotallymounted on co-axial pivots intermedilate their ends, saidleversfbeing connected each 7,0

at one end to ysaid'round rail near opposite ends thereof, groovedrollers on the carriage engaging the round rail, slide bearings on saidcarriage embracing said round rail, cylindrical rollers on said carriagerunning on said other.' 75

4 l rails with capacity for limited transverse movement thereon,` andmeans engaging the other ends of both said levers for turning them abouttheir pivots to move said round rail and the car- .riage transversely tothe printing plane.

15. A typewriter comprising a frame, a platen carriage, a plurality ofrails parallel to the platen axis for supporting and guiding saidcarriage in Asaid frame, a plurality of levers pivotally mounted onco-axial pivots intermediate their ends, said levers being connectedeach at one end to one of said'rails nearopposlte ends thereof, guidemeans on the Vcarriage engaging the last-mentioned rail in a-mannerpreventing movement ol.' the carriage transversely to saidlastmentionedrail, and means engagingthe other ends of both said levers for turningthem about said pivots to move said last-mentioned rail and carriagetransversely to the printing plane, the axis of the rail when the latteris in the middle of its range of transverse movement andthe, common axisoi the lever pivots lying in a plane parallel to the printing plane.`

e ment of th `tively to the printing plane.

16.' A typewriter comprising a. frame,- a platen I carriage, a pluralityof rails parallel to the platen axis for supporting and guiding saidcarriage in said frame, a plurality of levers pivotally mounted onco-axial pivots intermediate their ends, said levers being connectedeach at one end to one of said rails near opposite ends thereof, guidemeans on the carriage engaging the lastmentioned ail in a mannerpreventing move- HUGO fscHmrt.

